What steps are required for the following tray indicator icon to disappear? Alternatively, is it possible to hide this icon manually?
Ubuntu – How to hide the “An error occurred” tray indicator icon
indicatorpackage-managementsystem-trayunity
Related Solutions
For Java Apps:
Actually for JDownloader case, It's a modular design. Tray icon comes as a plugin that can be disabled from:
JDownloader → Addons → Addon Manager → Extensions → Uncheck Activate box for JD Light Tray
For Java applications general case, It is possible to use Java security manager by writing a custom policy rules.
Create
java.policyfile in~/.jdownloadercontains:grant codeBase "file:/home/user/.jdownloader/-" { // full access // permission java.security.AllPermission; // AWTPermission full or only selected elements from it // permission java.awt.AWTPermission "*"; permission java.awt.AWTPermission "accessClipboard"; permission java.awt.AWTPermission "accessEventQueue"; // permission java.awt.AWTPermission "accessSystemTray"; permission java.awt.AWTPermission "createRobot"; permission java.awt.AWTPermission "fullScreenExclusive"; permission java.awt.AWTPermission "listenToAllAWTEvents"; permission java.awt.AWTPermission "readDisplayPixels"; permission java.awt.AWTPermission "replaceKeyboardFocusManager"; permission java.awt.AWTPermission "setAppletStub"; permission java.awt.AWTPermission "setWindowAlwaysOnTop"; permission java.awt.AWTPermission "showWindowWithoutWarningBanner"; permission java.awt.AWTPermission "toolkitModality"; permission java.awt.AWTPermission "watchMousePointer"; // Added by try and learn permission java.io.FilePermission "/-", "read,write,delete"; permission java.util.PropertyPermission "*", "read,write"; permission java.util.logging.LoggingPermission "control"; permission java.lang.RuntimePermission "*"; permission java.net.NetPermission "*"; permission java.security.SecurityPermission "*"; permission javax.net.ssl.SSLPermission "*"; permission java.net.SocketPermission "*", "connect,resolve"; permission java.lang.reflect.ReflectPermission "*"; };Modify
jdownloaderlaunch script to use custom policysudo nano /usr/bin/jdownloaderAdd:
-Djava.security.manager -Djava.security.policy=java.policyto java command call:exec java ${JAVA_OPTIONS} -Djava.security.manager -Djava.security.policy=java.policy -jar JDownloader.jar $*
These are the minimum rules that allowed me to launch jdownloader. You may need to add more permissions. Because there is no deny option you have to write all needed grant rules.
References:
java.awt: Class SystemTrayjava.awt: Class AWTPermissionjava.security: Class BasicPermissionSee Direct Known Subclasses if you want to write a general template that grant
AllPermissionexceptaccessSystemTray. So you can use it for all remaining java apps.
BTW, try to comment one of the rules by adding // to the beginning of line; So you can see how the error of denied permissions looks like. It tells you which permission you should to add. Also notice that I have used many - & * trying to extend rules as I'm looking for a quick solution (default was AllPermission anyway) and I'm not looking to jail the application.
Here is a template to start with, trying to grant all possible permissions:
grant codeBase "file:/home/user/.jdownloader/-" {
// permission java.security.AllPermission;
// permission java.awt.AWTPermission "*";
permission java.awt.AWTPermission "accessClipboard";
permission java.awt.AWTPermission "accessEventQueue";
// permission java.awt.AWTPermission "accessSystemTray";
permission java.awt.AWTPermission "createRobot";
permission java.awt.AWTPermission "fullScreenExclusive";
permission java.awt.AWTPermission "listenToAllAWTEvents";
permission java.awt.AWTPermission "readDisplayPixels";
permission java.awt.AWTPermission "replaceKeyboardFocusManager";
permission java.awt.AWTPermission "setAppletStub";
permission java.awt.AWTPermission "setWindowAlwaysOnTop";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner";
permission java.awt.AWTPermission "toolkitModality";
permission java.awt.AWTPermission "watchMousePointer";
permission javax.sound.sampled.AudioPermission "*";
permission javax.security.auth.AuthPermission "*";
// permission javax.security.auth.kerberos.DelegationPermission "";
permission javax.xml.bind.JAXBPermission "*";
permission java.nio.file.LinkPermission "hard";
permission java.nio.file.LinkPermission "symbolic";
permission java.util.logging.LoggingPermission "control";
// permission java.lang.management.ManagementPermission "*";
permission javax.management.MBeanServerPermission "*";
permission javax.management.MBeanTrustPermission "*";
permission java.net.NetPermission "*";
permission java.util.PropertyPermission "*", "read,write";
permission java.lang.reflect.ReflectPermission "*";
permission java.lang.RuntimePermission "*";
permission java.security.SecurityPermission "*";
permission java.io.SerializablePermission "*";
permission java.sql.SQLPermission "*";
permission javax.net.ssl.SSLPermission "*";
permission javax.management.remote.SubjectDelegationPermission "*";
permission javax.xml.ws.WebServicePermission "*";
// permission "*";
permission java.io.FilePermission "/-", "read,write,execute,delete,readlink";
permission javax.management.MBeanPermission "*", "*";
// permission javax.security.auth.PrivateCredentialPermission "", "read";
permission javax.security.auth.kerberos.ServicePermission "*", "initiate,accept";
permission java.net.SocketPermission "*", "accept,connect,listen,resolve";
permission java.net.URLPermission "*";
};
Note:
Java Policy Tools is a GUI tool to edit policy files. It make it more easy t find out all available options from drop box. It should be already install with Java package.
Here http://ubuntuforums.org/showthread.php?t=2276023 posted the solution worked for me finally on 15.04.
sudo apt-get install sni-qt:i386
Then need to restart Skype.
Best Answer
The best and recommended way to make the error notification icon disappear is to resolve the root cause. The message shown in the screenshot above notifies you about a serious problem with the software sources. It seems that you are having unmet dependencies.
To solve this issue execute
sudo apt install -f. If you still receive this special error message, investigate the software sources by checking the/etc/apt/sources.listfile and the files in theetc/apt/sources.list.dfolder for wrong entries and correct them.When you execute
sudo apt updateafterwards, this error notification icon will be gone and that's the way you should go. Removing the icon manually would not be the solution you want, operating system security and stability is more important than optical things.